/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package friendManager;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.swing.JOptionPane;

/**
 *
 * @author DELL
 */
public class UpdateFriendServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet UpdateFriendServlet</title>");            
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet UpdateFriendServlet at " + request.getContextPath() + "</h1>");
            out.println("</body>");
            out.println("</html>");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    
    
        public void wrong1() {
        String msg = "名字不能为空！";
        String title = "信息提示";
        int type = JOptionPane.YES_NO_CANCEL_OPTION;
        JOptionPane.showMessageDialog(null, msg, title, type);

    }

               public void wrong2() {
        String msg = "该联系人不存在，无法修改！";
        String title = "信息提示";
        int type = JOptionPane.YES_NO_CANCEL_OPTION;
        JOptionPane.showMessageDialog(null, msg, title, type);

    }
        
        

    
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
      
        String friendname = new String(request.getParameter("name").getBytes("ISO-8859-1"), "UTF-8");
        if (friendname.length()==0) {
            wrong1();
             response.sendRedirect("http://localhost:8081/PersonInforMSys/friendManager/updateFriend.jsp");
        }
        else{
        
            try {
                
                 Connection con = null;
                java.sql.Statement stmt = null;
                ResultSet rs = null;

                Class.forName("com.mysql.jdbc.Driver");

                String url = "jdbc:mysql://localhost:3306/person?useUnicode=true&characterEncoding=gbk";

                con = DriverManager.getConnection(url, "skyline", "739349");

                stmt = con.createStatement();
                String sql = "select * from friends where name='" + friendname + "'";

                rs = stmt.executeQuery(sql);
                rs.last();
                int k = rs.getRow();
                rs.beforeFirst();
                if (k <1) {
                    wrong2();

                      response.sendRedirect("http://localhost:8081/PersonInforMSys/friendManager/updateFriend.jsp");

                } 
                 else   {
                         HttpSession session = request.getSession();
                       ArrayList friendsList = null;
                      friendsList = new ArrayList();
                      while(rs.next()){
                        LookFriendBean friendBean = new LookFriendBean();
                        friendBean.setName(rs.getString("name"));
                        friendBean.setPhone(rs.getString("phone"));
                        friendBean.setEmail(rs.getString("email"));
                        friendBean.setAddr(rs.getString("addr"));
                        friendBean.setQq(rs.getString("qq"));
                        friendsList.add(friendBean);
                      }
                        session.setAttribute("friendsList2", friendsList);
                         ArrayList friendsList3= null;
                       friendsList3= new ArrayList();
                       UpdateFriendBean ufb=new UpdateFriendBean();
                       ufb.setName(friendname);
                    friendsList3.add(ufb);
                    session.setAttribute("friendsList3", friendsList3);
                }
                    rs.close();;
                    stmt.close();
                    con.close();
                    
           
            response.sendRedirect("http://localhost:8081/PersonInforMSys/friendManager/updateFriendMessage.jsp");

      
                
            } catch (Exception e) {
            }

     }          
             
        
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
